diff --git a/firmware/controllers/system/efi_gpio.h b/firmware/controllers/system/efi_gpio.h
index 052b48049b..83072844d1 100644
--- a/firmware/controllers/system/efi_gpio.h
+++ b/firmware/controllers/system/efi_gpio.h
@@ -171,6 +171,7 @@ public:
 	OutputPin checkEnginePin;
 
 	NamedOutputPin tachOut;
+	// todo: remove this feature https://github.com/rusefi/rusefi/issues/1775
 	NamedOutputPin dizzyOutput;
 
 	OutputPin fsioOutputs[FSIO_COMMAND_COUNT];